Motorcycle Cylinder Head Gasket Dead On Seal For Honda Cb900f And Cbr900rr Cbr919rr Oem 12251 Mas 003 Zero Drama Swap 2002 To 2007 And 1996 To 1997 Badass Build For Real Riders
✔️ Fits CBR900RR CB900F OEM 12251 MAS 003 zero gaps
This sealed cylinder head gasket bolts straight onto Honda sport bikes and standard trail machines to stop combustion gases and oil from mixing. Mechanics drop it in during top end rebuilds to maintain clean compression and steady cooling flow between the engine block and head.
✅ Replaces official part code 12251 MAS 003 on factory engines✅ Works on CBR900RR and CBR919RR builds from the late nineties
✅ Handles extreme exhaust temperatures without blowing seals
✅ Slides into place without cutting or custom machining work
💡 What actually causes engine oil to leak past the cylinder head gasket during hard pulls?
Fresh seals lock steel plates together while routing fluid straight through the water jacket instead of bleeding pressure out past the valve cover studs. When you swap one in, you get these handy perks down below.
- Keeps combustion gases trapped inside so your compression numbers stay strong
- Routes coolant straight through the fins so your temperature gauge reads low
- Holds alignment tabs that lock flat against the block under heavy vibration
- Matches factory thickness specs so the head bolts seat without cross threading